Watch this, skip that

"Who Do You Think You Are?" 9 p.m., TLC There are certain benefits to being a celebrity. For one, if you're willing to go on "Who Do You Think You Are?" the producers will arrange to trace your family tree for you.

Luckily for us, this can be a very interesting process to watch – at least in the way it is presented in this show, which moves from NBC to TLC for its fourth season. Typically, one aspect of each celebrity's background is singled out and turned into a mini-history lesson. Tonight, Kelly Clarkson learns about her great-great-great grandfather, a Civil War veteran and senator from Ohio.

The heavy-handed product placement for Ancestry.com does get annoying, but otherwise this is a smart show, and a nice addition to the usually forgettable TLC lineup.

Verdict: Watch this

WATCH THIS

"Secrets of the Dead" 10 p.m., PBS The discovery in 1898 of an urn purportedly containing bones and ashes of the Buddha has long been considered a hoax by academics. Historian Charles Allen re-examines the evidence about the authenticity of this find.

"Web Therapy" 11 p.m., Showtime This is a few minutes outside our prime time boundary, but it's a slow night and this is a worthwhile show. Lisa Kudrow stars as kooky therapist Fiona Wallace, who treats her clients via webcam. The highlights of the half-hour episodes are the improvised sessions with her patients, which this season will include Steve Carell and Billy Crystal.

SKIP THAT

"The Vineyard" 10 p.m., ABC Family The network may be contractually obligated to keep "Family" in its name, but that has been little impediment to its conversion to a channel aimed at women under 35. Such ambitions, of course, require ABC Family to launch some sort of "Jersey Shore" knockoff. This is it, an ensemble reality series focusing on 11 young people spending the summer on Martha's Vineyard, Mass.